Sticking A Gumpaste Figure On Top Of My Cake

Hi guys I am putting the finishing touches on a cake I made for my baby cousin today, and wanted to top the cake with a gumpaste number "2". I made the figure a few days ago, so now it's hard and ready to stick onto the cake, but I am lost on how to "glue" it to the fondant? Any hinters?

well, it would have been easier to put a wire or something into it while the gumpaste was soft when you first made it. Maybe you could attach the bottom of it to some lollipop sticks with melted chocolate or something??